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19 条记录 (耗时 0.008 秒)

    Continuously calibrating temperature controller
    2.
    发明公开
    Continuously calibrating temperature controller 失效
    Kontinuierlich selbstkalibrierender Temperaturregler。

    公开(公告)号：EP0670481A1

    公开(公告)日：1995-09-06

    申请号：EP95100009.0

    申请日：1995-01-02

    申请人： Becton Dickinson and Company

    发明人： Benton, Gene A.

    IPC分类号： G01K1/02 ,  G08C15/08

    CPC分类号： G08C15/08 ,  G01K1/026 ,  G01K15/00

    摘要： A multiple-loop temperature controller (50,72) using RTD sensors (82) is continuously calibrated by performing a zero or full scale calibration during each operating cycle. An arrangement of four multiplexers (74-80) is used to successively connect each RTD sensor (82) to a pair of current sources (84,86) and an A/D converter (92), thereby allowing the current sources (84,86) and A/D converter (92) to be shared among all of the RTD sensors (82). Measurement errors are minimized by using the same multiplexers (74-80) for temperature measurement and calibration, with calibration being performed by connecting the multiplexers (74-80) to a ground reference or precision resistor (112). Interrupt-driven temperature loop processing is used to reduce A/D conversion delays, thereby allowing high-precision A/D converters with long settling times to be used. The multiple-loop temperature controller (50,72) is advantageously utilized in an automated blood culturing system (10) requiring precise control of sample temperatures.

    摘要翻译： 使用RTD传感器（82）的多回路温度控制器（50,72）通过在每个操作循环期间执行零或全刻度校准来连续校准。 使用四个多路复用器（74-80）的布置来将每个RTD传感器（82）连续地连接到一对电流源（84,86）和A / D转换器（92），从而允许电流源 86）和A / D转换器（92）在所有RTD传感器（82）之间共享。 通过使用相同的多路复用器（74-80）进行温度测量和校准，使测量误差最小化，通过将多路复用器（74-80）连接到接地参考或精密电阻（112）来进行校准。 中断驱动的温度回路处理用于减少A / D转换延迟，从而允许使用长稳定时间的高精度A / D转换器。 多回路温度控制器（50,72）有利地用于需要精确控制样品温度的自动血液培养系统（10）中。

    LOW SPEED GATE CIRCUIT.
    3.
    发明公开
    LOW SPEED GATE CIRCUIT. 失效
    门低速。

    公开(公告)号：EP0292476A4

    公开(公告)日：1989-05-11

    申请号：EP86906649

    申请日：1986-10-20

    申请人： PACIFIC BELL

    发明人： CARSE GREGG DALE

    IPC分类号： G08C15/12 ,  H04M11/00 ,  H04M11/04 ,  H04M11/06 ,  H04Q11/04 ,  G08C15/08

    CPC分类号： H04M11/068 ,  G08C15/12 ,  H04M11/002 ,  H04M11/04 ,  H04Q11/04

    摘要： A gate circuit (26) for use in a telephone system which includes one or more ports (14) located on a subscriber's premises for connecting equipment on the premises to a specified vendor of services (18) located at a location remote from the mutiplexed input serial data stream (24) comprising a plurality of digital words in a serial format, each said digital word representing a data word input on a specific port (14), the port being specified by the position of the digital word in the input serial data stream relative to a synchronization signal present in the telephone system. The telephone system also includes a time multiplexed output serial data stream (28) comprising a plurality of digital words in serial format, each data word representing a data word received from a vendor (38) to be sent to a specified port (14). The port (14) to which said data word is to be sent is specified by position of said digital word in said output serial data stream relative to a synchronization signal present in the telephone system.

    Tieftemperatur-Messschaltung
    4.
    发明公开
    Tieftemperatur-Messschaltung 失效
    Tieftemperatur-Messschaltung。

    公开(公告)号：EP0168518A1

    公开(公告)日：1986-01-22

    申请号：EP84108568.1

    申请日：1984-07-20

    申请人： Deutsches Elektronen-Synchrotron DESY

    发明人： Peters, Jens, Dipl.-Ing.

    IPC分类号： G01R27/00 ,  G08C15/08 ,  G01K7/16

    CPC分类号： G08C15/08 ,  G01K1/026 ,  G01R27/00

    摘要： Eine Tieftemperatur-Widerstands-Meßschaltung (R n ) mit Multiplexern 1 - u (MPxu) ist aus LOCMOS-Bauelementen aufgebaut, die im Betrieb innerhalb eines Kryostaten in einem Bad aus flüssigem Helium untergebracht sind. Dadurch erhöht sich bei gleicher Anzahl der aus dem Kryostaten nach außen geführten Kabel die Auflösung der Schaltung um einen Faktor 30 oder mehr.

    摘要翻译： 1.一种具有多个温度依赖电阻器（Rn）的低温测量电路，至少一个驱动电阻器（Rn）的多路复用器（MPXn），通过多路复用器向电阻器提供电流的恒流源（KS） 或多路复用器（MPXn）连接到多路复用器（MPXn）的放大器（V），用于放大跨过电阻器（Rn）的电压降;以及指示器（A），连接在用于指示的放大器（V）之后 在每个单独电阻器（Rn）上测量的电压的特征在于，除了电阻器（Rn）之外，多路复用器或多路复用器（MPXn），恒流源（KS）和放大器（V）也被放置在该部分 的低温恒温器（K），其在使用中包含液氦，并且多路复用器（MPXn）和放大器（V）在LOCMOS技术中执行。

    MULTIPLE RESISTIVE SENSORS FOR A CORIOLIS EFFECT MASS FLOWMETER
    6.
    发明公开
    MULTIPLE RESISTIVE SENSORS FOR A CORIOLIS EFFECT MASS FLOWMETER 失效
    多阻性阅读捐助者为大规模流量仪表装置

    公开(公告)号：EP1000324A1

    公开(公告)日：2000-05-17

    申请号：EP98925124.4

    申请日：1998-06-02

    申请人： MICRO MOTION INCORPORATED

    发明人： HAYS, Paul, J. ,  ZOLOCK, Michael, J.

    IPC分类号： G01F1/84 ,  G01K1/02 ,  G08C15/08

    CPC分类号： G01F15/024 ,  G01F1/8409 ,  G01F1/8431 ,  G01F1/8436 ,  G01F1/8495 ,  G01K1/026 ,  G01K7/206

    摘要： A circuit for utilizing multiple resistive sensors (109, 110) and in particular resistive temperature sensors while minimizing the number of conductors (308, 309, 310) necessary to measure the multiple sensors. The multiple sensors are connected in series and the voltage is measured at each node in the series connection of sensors. A switching device (F0) then opens to remove one of the sensors from the voltage supply (5v) allowing a measurement to be made of the resistance of the conductor between the temperature sensors and a remote transmitter (20). The measured sensor resistances are then compensated with the measured conductor resistance to obtain a conductor-length compensated resistance for each of the multiple resistive sensors.

    BURST QAM DOWNHOLE TELEMETRY SYSTEM
    8.
    发明公开
    BURST QAM DOWNHOLE TELEMETRY SYSTEM 审中-公开
    钻孔数据的传输系统类型华富音频包

    公开(公告)号：EP1295271A2

    公开(公告)日：2003-03-26

    申请号：EP01946644.0

    申请日：2001-06-22

    申请人： Halliburton Energy Services, Inc.

    发明人： WEI, Michael ,  TRAINOR, William

    IPC分类号： G08C15/08

    CPC分类号： H04L27/34 ,  E21B47/12 ,  G01V11/00

    摘要： A downhole telemetry system that transmits a burst-QAM uplink signal to the surface of the well is disclosed. In a preferred embodiment, the well includes composite tubing having circumferentially-spaced electrical conductors helically wound within the walls of the tubing. A downhole instrument coupled to a pair of adjacent conductors transmits a burst-QAM uplink signal to a surface system similarly coupled to the pair of adjacent conductors. The burst-QAM signal, preferably comprises a series of data frames (602) carrying telemetry data. Each data frame is preferably preceded by a quiet interval (604) (when no signal is present), a timing synchronization sequence, and a training sequence (606, 608). The timing synchronization sequence is designed for easy timing recovery at the surface, and the training sequence is designed to aid the adaptation of the equalizer. The data frame itself preferably includes a synchronization field, a data count, and a checksum in addition to the data. Direct digital synthesis is preferably employed to modulate the uplink signal.